Cd2+前体反应时间对CdSe量子棒长径比的调控及其光学特性研究

doi:10.11949/0438-1157.20190112

化工学报 ›› 2019, Vol. 70 ›› Issue (7): 2795-2801.DOI: 10.11949/0438-1157.20190112

• 材料化学工程与纳米技术 • 上一篇下一篇

Cd²⁺前体反应时间对CdSe量子棒长径比的调控及其光学特性研究

冯可¹(),王玥¹,李金华¹(),楚学影¹,胡思怡²,林志远¹

1. 长春理工大学理学院, 吉林长春 130022
2. 中国科学院苏州生物医学工程技术研究所医学检验技术研究室, 江苏苏州 215163

收稿日期:2019-02-11 修回日期:2019-05-06 出版日期:2019-07-05 发布日期:2019-07-05
通讯作者: 李金华
作者简介:冯可（1992—），男，硕士研究生，<email>463343632@qq.com</email>
基金资助:
教育部“111”创新引智项目(D17017);国家自然科学基金项目(21703017, 11604024);武器装备预研基金重点项目(6140414020102);吉林省科技发展计划项目(20180519017JH);吉林省国际科技合作项目(20190701029GH);长春理工大学科技创新基金项目(XQNJJ-2016-14)

Regulation of Cd²⁺ precursor reaction time on aspect ratio of CdSe quantum rod and its optical properties

Ke FENG¹(),Yue WANG¹,Jinhua LI¹(),Xueying CHU¹,Siyi HU²,Zhiyuan LIN¹

1. College of Science, Changchun University of Science and Technology, Changchun 130022, Jilin, China
2. Medical Diagnostics Department, Suzhou Institute of Biomedical Engineering and Technology, CAS, Suzhou 215163, Jiangsu, China

Received:2019-02-11 Revised:2019-05-06 Online:2019-07-05 Published:2019-07-05
Contact: Jinhua LI

摘要/Abstract

摘要：

CdSe量子棒是一种具有良好光学特性的半导体纳米材料，不同长径比的量子棒可应用于光电材料及器件制备。采用高温油相合成法制备CdSe量子棒，在只改变前体反应时间的前提下，探究其对于CdSe量子棒长径比的变化机理并对其光学特性进行对比分析。实验结果表明CdSe量子棒随着反应时间的增长粒径增大并且发射峰的峰位产生了红移的现象。通过透射电子显微镜表征后发现量子棒随着前体反应时间的增加长度逐渐变长，长径比逐渐变大。因此可以用该方法可以控制量子棒的生长。

关键词: 量子棒, 纳米材料, 纳米粒子, 长径比, 前体反应时间, 吸收

Abstract:

Cadmium selenide(CdSe) quantum rods are semiconductor nanomaterials with good optical properties. Quantum rods with different aspect ratios can be applied to optoelectronic materials and device fabrication. The CdSe quantum rods were prepared by high temperature oil phase synthesis. Under the premise of changing the reaction time of the precursors, the change mechanism of the length-diameter ratio of CdSe quantum rods was investigated and the optical properties were compared. The results show that the particle size of CdSe quantum rod increases with the increase of reaction time and the peak position of the emission peak produces a red shift phenomenon. After characterization by transmission electron microscopy, it was found that the quantum rod gradually became longer as the reaction time of the precursor increased, and the aspect ratio gradually became larger. Therefore, the growth of the quantum rod can be controlled by this method.

Key words: quantum rods, nanomaterials, nanoparticles, aspect ratio, precursor reaction time, absorption

中图分类号:

O 469

冯可, 王玥, 李金华, 楚学影, 胡思怡, 林志远. Cd²⁺前体反应时间对CdSe量子棒长径比的调控及其光学特性研究[J]. 化工学报, 2019, 70(7): 2795-2801.

Ke FENG, Yue WANG, Jinhua LI, Xueying CHU, Siyi HU, Zhiyuan LIN. Regulation of Cd²⁺ precursor reaction time on aspect ratio of CdSe quantum rod and its optical properties[J]. CIESC Journal, 2019, 70(7): 2795-2801.

图/表 10

图1 CdSe纳米棒尺寸分布

Fig.1 CdSe nanorod size distribution

图2 不同反应时间Cd2+前体制备的CdSe量子棒的TEM图

Fig.2 TEM images of CdSe quantum rods prepared by Cd2+ precursors with different reaction time

表1 不同反应时间Cd2+前体制备的CdSe量子棒的长径比

Table 1 Length-diameter ratio of CdSe quantum rods prepared by Cd2+ precursors with different reaction time

Cd²⁺前体反应时间/h	长轴/nm	短轴/nm	长径比
0	10.21±1.32	3.55±0.52	2.87±0.23
8	10.40±1.80	3.41±0.53	3.05±0.10
16	12.03±1.72	3.84±0.55	3.13±0.12
20	14.45±1.77	4.60±0.59	3.14±0.17
24	16.23±1.92	4.76±0.65	3.41±0.16
31	18.41±2.22	4.93±0.74	3.73±0.20

图3 不同反应时间Cd2+前体制备的CdSe量子棒的长径比变化趋势

Fig.3 Different length-diameter ratio of CdSe quantum rods prepared by Cd2+ precursors with different reaction time

图4 不同反应时间Cd2+前体的吸收光谱

Fig.4 Absorption spectrum of Cd2+ precursor with different reaction time

图5 不同反应时间Cd2+前体吸收图谱X轴截距

Fig.5 Absorption spectrum X-axis intercept of Cd2+precursor with different reaction time

图6 CdSe量子棒生长机制

Fig.6 Growth mechanism of CdSe nanorods

图7 不同反应时间Cd2+前体制备的CdSe量子棒的发射光谱及其归一化发射光谱

Fig.7 Emission spectra and normalized emission spectra of CdSe quantum rod prepared by Cd2+ precursors with different reaction time

图8 不同反应时间Cd2+前体制备的CdSe量子棒的吸收光谱及其归一化吸收光谱

Fig.8 Absorption spectra and normalization of CdSe quantum rod prepared by Cd2+ precursors with different reaction time

图9 用不同反应时间Cd2+前体制备的CdSe量子棒的光学稳定性

Fig.9 Optical stability of CdSe quantum rod prepared by Cd2+ precursors with different reaction time

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Cd²⁺前体反应时间对CdSe量子棒长径比的调控及其光学特性研究

Regulation of Cd²⁺ precursor reaction time on aspect ratio of CdSe quantum rod and its optical properties

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